Just and update on this method:



There were 27353 horse form lines in the database at this point in time. We update when we get time. There were 1894 selections for the System
There were 1567 which Lost (did not win race) for the System for a strike rate of 82.73%
You had to pay out $1703.75 but brought in $1799.3 after 5% commission. This means a Profit or loss of $95.55 or a percentage profit/loss of 5.04%

Dropped $6 over about 300 selections which is not bad. A few extra filters could probably make this worthwhile.

One filter I tried was Career Races >= 5 days to ensure we have an acceptable base rating for the don scott calculation and we ended up with :



There were 1363 selections for the System
There were 1154 which Lost (did not win race) for the System for a strike rate of 84.67%
You had to pay out $1136.48 but brought in $1294.85 after 5% commission. This means a Profit or loss of $158.37 or a percentage profit/loss of 11.62%
Thats 17.6 times the maximm liability of $9 (10-1).